Windows 7 - Installed vs Usable Ram

I've got a new Dell XPS 8100, i5-750. Shows:

Installed Ram: 6 gb (2.96 gb usable)
System: 64 bit

System managed paging, which shows a page size of 3 gb. I have a GTS 240 1 gb card. Shouldn't all my Ram be usable? Suggestions?

Two things to try, 1st:

Memory - Set Maximum Amount Used by Windows 7

1) Start> In search box type msconfig.exe Click on msconfig.exe

2) On System Configuration dialog box select the Boot tab

3) Click Advanced Options

4) Uncheck the Maximum Memory option

5) OK your way out

6) Reboot

If that doesn't fix it, sometimes rearranging the physical Ram sticks can fix this. Move them to different slots.

A Guy

Did that, no change. I reseated the RAM and swapped the two 2 GB sticks with each other. Now I get 6 gb ram (4.96 gb usable) 3.75 available. I've read other posts that this is usually a MB problem. I'm going to try 1 stick at a time moving it from socket to socket to see if there's a dead socket.... then I guess it's a long call to Dell support.

edit: My bad, I "did that" before I moved the ram around. I just did the msconfig thing, unchecking the max ram bot, and now I show 6 gb! Thank you much.

Hey great. Sometimes it's the easy things. Bet Dell would have had you reformat, etc. You'd still be screaming, lol. A Guy

Thanks 4 the info, I upgraded from 4 to 8GB on my Windows 7 x64 and now all 8GB are usable.

my system configuration is Processor Intel i5 750 motherboard ASUS P7H55-V graphic card gefoece Nvidia 9800GTX+ ram 6GB so my window 7 64bit show usable ram 4GB how can i solve this error plz help me out??????
i use (msconfig.exe) five time and change the (boot tab advance option) and also five time restart the system and taskmeneger show me again in again usable ram 4GB Installed 6GB Ram plz help me out this troubleshooting

Go to the performance tab of Task Manager.

Choose Resource Monitor. Then choose the memory tab. Post a screenshot of that tab.